Nannotax3 - ntax_mesozoic - Carinolithus magharensis

Carinolithus magharensis


Classification: ntax_mesozoic -> Podorhabdales -> Calyculaceae -> Carinolithus -> Carinolithus magharensis
Sister taxa: C. magharensis, C. superbus, C. poulnabronei, C. sp.

Distinguishing features:
Parent taxon (Carinolithus): Trumpet-shaped coccoliths with small, disc-like proximal shield and high, flaring distal shield.
This taxon: Trumpet-shaped coccoliths with minute, disc-like proximal shield and very narrow stem-like distal shield that flares distally to form a hexagonal structure. Seen in side view, but the distal hexagonal structures are also seen as disarticulated hexaliths.


Sub-taxa & variants (time control age-window is: 0-800Ma)
Carinolithus magharensis subsp. magharensis
distal shield > 7 µm across
Carinolithus magharensis subsp. minor
distal shield < 7 µm

Taxonomy:

Citation: Carinolithus magharensis (Moshkovitz & Ehrlich, 1976) Bown, 1987
Rank: Species
Basionym: Hexalithus magharensis Moshkovitz & Ehrlich, 1976

Farinacci & Howe catalog pages: H. magharensis *

Distinguishing features:
Parent taxon (Carinolithus): Trumpet-shaped coccoliths with small, disc-like proximal shield and high, flaring distal shield.
This taxon: Trumpet-shaped coccoliths with minute, disc-like proximal shield and very narrow stem-like distal shield that flares distally to form a hexagonal structure. Seen in side view, but the distal hexagonal structures are also seen as disarticulated hexaliths.


Morphology: Originally described from disarticulated hexaliths as Hexalithus. Tethyan distribution.

Search data:
TagsLITHS: placolith, circular, rod-shaped, cylindrical, CA: closed, CROSS-POLARS: rim-unicyclic, V-prominent,
MetricsLith size: 7->9µm;
Data source notes: Bown (1987) - length
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): in mid part of NJT11 subzone (50% up, 167.2Ma, in Bathonian stage). Data source: Mattioli & Erba 1999, fig. 12
First occurrence (base): within NJ8a subzone (171.79-174.59Ma, base in Toarcian stage). Data source: Bown & Cooper 1998

Plot of occurrence data:

References:

Bown, P. R. & Cooper, M. K. E. (1998). Jurassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 34-85. gs

Bown, P. R. (1987a). Taxonomy, evolution, and biostratigraphy of Late Triassic-Early Jurassic calcareous nannofossils. Special Papers in Palaeontology. 38: 1-118. gs

Mattioli, E. & Erba, E. (1999). Synthesis of calcareous nannofossil events in Tethyan lower and middle Jurassic successions. Rivista Italiana di Paleontologia e Stratigrafia. 105(3): 343-376. gs V O

Moshkovitz, S. & Ehrlich, A. (1976b). Distribution of Middle and Upper Jurassic calcareous nannofossils in the northeastern Negev, Israel and in Gebel Maghara, northern Sinai. Bulletin of the Geological Survey of Israel. 69: 1-47. gs


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Carinolithus magharensis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-11-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10197 Go to Archive.is to create a permanent copy of this page - citation notes



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